CN115029934A - Bio-based degradable dip-coating-containing scraping knitted fabric polyurethane synthetic leather base blank - Google Patents

Bio-based degradable dip-coating-containing scraping knitted fabric polyurethane synthetic leather base blank Download PDF

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Publication number
CN115029934A
CN115029934A CN202210522223.9A CN202210522223A CN115029934A CN 115029934 A CN115029934 A CN 115029934A CN 202210522223 A CN202210522223 A CN 202210522223A CN 115029934 A CN115029934 A CN 115029934A
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China
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base cloth
bio
base
based degradable
dmf
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Inventor
曹阳
章腾蛟
吴登
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Zhejiang Hexiang New Material Technology Co ltd
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Zhejiang Hexiang New Material Technology Co ltd
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Priority to CN202210522223.9A priority Critical patent/CN115029934A/en
Publication of CN115029934A publication Critical patent/CN115029934A/en
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B3/00—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating
    • D06B3/10—Passing of textile materials through liquids, gases or vapours to effect treatment, e.g. washing, dyeing, bleaching, sizing, impregnating of fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • D06C7/02—Setting
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0009—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using knitted fabrics
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0036—Polyester fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/04—Vegetal fibres
    • D06N2201/042—Cellulose fibres, e.g. cotton
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    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1607—Degradability
    • D06N2209/1614—Biodegradable
    • D—TEXTILES; PAPER
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    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The application relates to a bio-based degradable polyurethane synthetic leather bottom blank containing dip-coating scraping knitted fabric, which relates to the technical field of synthetic leather manufacturing, wherein a base fabric of the bottom blank is a cotton-polyester blended knitted fabric; the preparation steps of the bottom embryo are as follows: firstly, pre-impregnating base cloth, wherein a pre-impregnating material comprises a bio-based degradable polyurethane resin, DMF (dimethyl formamide) and ultrafine graphene; secondly, coating slurry with bio-based degradable polyurethane resin on the pre-impregnated base cloth; thirdly, solidifying, namely solidifying the bio-based degradable polyurethane resin on the surface of the base cloth; washing the base cloth with clear water, and washing DMF on the base cloth; and fifthly, preheating, ironing, drying and shaping the base fabric to obtain the base blank. The obtained base blank does not pollute the surrounding environment and harm the health of people.

Description

Bio-based degradable dip-coating-containing scraping knitted fabric polyurethane synthetic leather base blank
Technical Field
The application relates to the technical field of synthetic leather manufacturing, in particular to a bio-based degradable dip-coating containing scraping knitted fabric polyurethane synthetic leather bottom blank.
Background
At present, because the leather has wide application, for example, the leather is widely used for manufacturing shoes and boots, furniture, bags and the like, and various leathers are used to simulate the composition and the structure of natural leather and can be used as plastic products of substitute materials of the natural leather. Usually, the impregnated non-woven fabric is used as a net layer, and the microporous polyurethane layer is used as a grain layer. The front and back surfaces of the leather are very similar to leather, have certain air permeability and are closer to natural leather than common artificial leather.
In the related art, most synthetic leathers are made by using non-woven fabrics of 100% chemical synthetic fibers (terylene and nylon) as a substrate and coating synthetic resin and various plastics, and because the chemical fibers are difficult to degrade, the environment is easily polluted, and most chemical fibers cause uncomfortable wearing due to incompatibility of the chemical fibers with skin. In addition, dimethyl formamide organic matters are mostly used as main solvents in the synthetic leather manufacturing process, so that a large amount of waste water and waste gas of dimethyl formamide can be generated in the synthetic leather manufacturing process, and the synthetic leather can be treated by a combustion method or a landfill method when the synthetic leather is treated.
In view of the above-mentioned related technologies, the inventors believe that synthetic leather is slowly biodegradable, and after use, whether the synthetic leather is treated by burning or landfill, the synthetic leather causes environmental pollution around and harms human health.
Disclosure of Invention
In order to improve the problem that the biodegradation of the synthetic leather is slow, the surrounding environment pollution can be caused and the health of personnel is harmed after the synthetic leather is treated by combustion or landfill, the application provides a bio-based degradable polyurethane synthetic leather base blank containing dip-coating and scraping knitted fabric.
The application provides a looped fabric polyurethane synthetic leather base embryo is scraped to bio-based degradable containing dip-coating adopts following technical scheme:
a bio-based degradable polyurethane synthetic leather base blank containing dip-coating scratch knitted fabric, wherein the base fabric of the base blank is cotton-polyester blended knitted fabric; the preparation steps of the bottom embryo are as follows: firstly, pre-impregnating base cloth, wherein a pre-impregnating material comprises a bio-based degradable polyurethane resin, DMF (dimethyl formamide) and ultrafine graphene; secondly, coating slurry with bio-based degradable polyurethane resin on the pre-impregnated base cloth; thirdly, solidifying, namely solidifying the bio-based degradable polyurethane resin on the surface of the base cloth; the fourth step is that the base cloth is washed by clean water, and DMF on the base cloth is cleaned; fifthly, preheating, ironing, drying and shaping the base cloth to obtain the base blank; the pre-impregnation material comprises 80-100 parts of bio-based degradable polyurethane resin, 300-400 parts of DMF (dimethyl formamide) and 5-10 parts of ultrafine graphene; the coating slurry comprises 60-70 parts of bio-based degradable polyurethane resin, 30-40 parts of polyurethane resin, 100 parts of DMF (dimethyl formamide), 5-10 parts of carboxymethyl cellulose, 5-10 parts of superfine graphene, 5-10 parts of ramie fiber powder and 2-5 parts of calcium gluconate.
Optionally, the preparation of the pre-impregnation material requires that the superfine graphene and DMF are added into a vacuum stirring kettle and stirred for 20-30min at 25-30 ℃ at 800r/min, then the bio-based degradable polyurethane resin is added and stirred for 30-40min at 1500r/min, vacuum defoaming is carried out for 60-120min, and then 100 mesh filtration is carried out to prepare the pre-impregnation working slurry.
Optionally, the preparation process of the coating slurry comprises the steps of adding the ultra-fine graphene, the ramie fiber powder, the carboxymethyl cellulose, the calcium gluconate and the DMF into a vacuum stirring kettle, stirring for 30min at 500 plus 1500r/min, adding the biodegradable polyurethane resin, stirring for 60-120min at 1000 plus 1500r/min, vacuum defoaming for 60-120min, and filtering with a screen of 180 plus 200 meshes to prepare the coating working slurry for later use.
Optionally, in the first step, the temperature of pre-impregnation is 50-60 ℃, and the time of pre-impregnation is 3-5 h; and in the process of pre-impregnation, continuously stirring the pre-impregnated base cloth.
Optionally, in the first step, the pre-impregnated base cloth is taken out of the pool, then the base cloth is hung in a drying chamber at 50-60 ℃ for 5-7min, and the base cloth is taken out of the drying chamber after the airing is finished.
Optionally, the first step includes a rubbing machine, the base cloth is placed in the rubbing machine after being taken out from the drying chamber, and the base cloth is pre-impregnated again after being rubbed at a low temperature for 3-5s in the rubbing machine.
Optionally, in the second step, the base cloth passes through a scraper, a second scraper and a third scraper in sequence, the first scraper, the second scraper and the third scraper are respectively arranged on the first scraper, the second scraper and the third scraper, the distance between the first scraper and the base cloth is 7-9cm, the distance between the second scraper and the base cloth is 1-3cm, and the distance between the third scraper and the base cloth is 0.2-0.6 cm.
Optionally, in the third step, the concrete step of solidification is to perform a cold air drying and solidification process for 1-2 hours on both sides of the base fabric at a temperature of 20-25 ℃.
Optionally, in the fourth step, the step of washing the base fabric with water is that the base fabric sequentially passes through a first water pool, a second water pool and a third water pool at a movement speed of 0.5m/s, and the base fabric is immersed in the water pools when passing through the water pools; the first water pool is saline solution, and the second water pool and the third water pool are clean water.
Optionally, in the fifth step, the time for ironing the base cloth is 1-3min, the temperature for drying the base cloth is 120-160 ℃, the time for drying the base cloth is 4-8min, the temperature for shaping the base cloth is 120-160 ℃, and the time is 5-9 s.
To sum up, this application includes following at least one kind of biological base degradable contains dip-coating and scrapes beneficial technological effect of looped fabric polyurethane synthetic leather base stock:
in the application, the base cloth of synthetic leather base embryo chooses cotton-polyester blending looped fabric for use, and the preparation step of synthetic leather base embryo is: the first step is to pre-impregnate the base cloth, wherein the pre-impregnated materials are bio-based degradable polyurethane resin, DMF and ultra-fine graphene. The preparation method comprises the steps of adding superfine graphene and DMF into a vacuum stirring kettle, stirring, adding the bio-based degradable polyurethane resin, stirring, performing vacuum defoaming, filtering with a 100-mesh sieve, and thus obtaining the pre-impregnation working slurry. And step two, coating on the pre-impregnated base fabric, wherein the coating material is bio-based degradable polyurethane resin, common polyurethane resin, DMF (dimethyl formamide), carboxymethyl cellulose, ultrafine graphene, ramie fiber powder and calcium gluconate. The preparation method comprises the steps of firstly adding the graphene, the ramie fiber powder, the carboxymethyl cellulose, the calcium gluconate and the DMF into a vacuum stirring kettle and stirring. And adding the biodegradable polyurethane resin after stirring, performing vacuum defoaming after stirring, and filtering for later use to prepare the coating working slurry. And thirdly, solidifying the biodegradable polyurethane resin on the surface of the base fabric. Washing the fourth part with clean water to clean DMF on the base fabric. And fifthly, preheating, ironing, drying and shaping the base cloth through an oven to obtain a base blank. Finally, the obtained bottom blank does not cause pollution to the surrounding environment and is harmful to the health of people.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of the present application do not denote a limitation of quantity, but rather denote the presence of at least one.
The embodiment of the application discloses a bio-based degradable dip-coating containing scraping knitted fabric polyurethane synthetic leather base blank.
Example 1:
the base cloth of the bottom blank is cotton-polyester blended knitted fabric.
The preparation steps of the bottom embryo are as follows:
the first step is as follows:
the base fabric is pre-impregnated, in order to improve the pre-impregnation effect of the base fabric, the pre-impregnation temperature is 50 ℃, and the pre-impregnation time is 3 hours, so that the effect of the base fabric in the pre-impregnation process is greatly improved. The base cloth is in the in-process that soaks in advance, often can preimpregnate more base cloth, thereby in order to prevent that the base cloth is in the in-process that soaks in advance, thereby laminating each other between the base cloth influences the effect that soaks in advance of base cloth, and the designer improves the back, and in the in-process that soaks in advance, the staff constantly stirs the base cloth that soaks in advance, prevents that the base cloth from in the in-process that soaks in advance, and the base cloth is laminated together between the base cloth.
The pre-impregnation material comprises 80 parts of bio-based degradable polyurethane resin, 300 parts of DMF (dimethyl formamide) and 5 parts of ultrafine graphene. The preparation of the pre-impregnation material requires that superfine graphene and DMF are added into a vacuum stirring kettle and stirred for 20min at 25 ℃ at 500r/min, then bio-based degradable polyurethane resin is added and stirred for 30min at 1000r/min, vacuum defoaming is carried out for 60min, and then 100 meshes are used for filtering to prepare the pre-impregnation working slurry.
In the process of pre-impregnation, because the base cloth of the base blank is a cotton-polyester blended knitted fabric, in the process of pre-impregnation, the pre-impregnation effect of the base cloth is poor, and workers find that the coverage rate of the bio-based degradable polyurethane resin, DMF (dimethyl formamide) and ultrafine graphene on the base cloth cannot meet the working requirement of the next step.
After improvement, a designer takes out the pre-impregnated base cloth from the pool, then hangs a plurality of base cloth in a drying chamber at 50 ℃ for drying treatment, and the drying duration is 5 min.
In practice, when a designer twists a towel, the designer finds that the water absorption of the towel laid flat is poor, the water absorption of the towel is greatly increased after the towel is kneaded, in order to increase the effect of the base cloth in the pre-impregnation process, the first step comprises a kneading machine, the base cloth is placed in the kneading machine after being taken out of a drying chamber, and the base cloth is pre-impregnated again after being kneaded for 3 seconds in the kneading machine. Designers find that the pre-impregnation effect of the base fabric is greatly improved after the base fabric is kneaded.
The second step is that: coating slurry containing biodegradable polyurethane resin is coated on the pre-impregnated base fabric. The coating slurry comprises 60 parts of bio-based degradable polyurethane resin, 30 parts of polyurethane resin, 100 parts of DMF (dimethyl formamide), 5 parts of carboxymethyl cellulose, 5 parts of superfine graphene, 5 parts of ramie fiber powder and 2 parts of calcium gluconate.
The preparation process of the coating slurry comprises the steps of adding superfine graphene, ramie fiber powder, carboxymethyl cellulose, calcium gluconate and DMF into a vacuum stirring kettle, stirring for 30min at a speed of 500r/min, adding the bio-based degradable polyurethane resin, stirring for 60min at a speed of 1000r/min, defoaming for 60min in vacuum, and filtering by using a 180-mesh sieve to prepare the coating working slurry for later use.
The base cloth passes through the machine of scraping in proper order, No. two scrapes the machine, No. three scrapes the machine, including a scraper, No. two scrapers and No. three scrapers on the machine of scraping, No. two scrapers, No. three scrapers respectively, and a scraper is 9cm apart from the interval of base cloth, and No. two scrapers are 3cm apart from the interval of base cloth, and No. three scrapers are 0.6cm apart from the interval of base cloth.
In the in-process of using, if scrape the coating that one step of biodegradable polyurethane resin targets in place at the base cloth, lead to the formation of bubble easily, through different intervals between scraper, No. two scrapers and No. three scrapers and the base cloth for biodegradable polyurethane resin scribbles the effect of scraping on the base cloth and can promote, prevents the appearance of bubble.
The third step: so that the bio-based degradable polyurethane resin is solidified on the surface of the base fabric. The concrete step of solidification is to carry out a cold air drying and solidification process for 1h on both sides of the base fabric under the condition that the temperature is 20 ℃.
The fourth step: washing the base cloth with clean water, and washing DMF on the base cloth. The specific steps of washing the base cloth with water are that the base cloth passes through a first water pool, a second water pool and a third water pool in sequence at a movement speed of 0.5m/s, and the base cloth is immersed in the water pools when passing through the water pools; the first water pool is saline solution, and the second water pool and the third water pool are clean water.
The base cloth soaked with the slurry is continuously conveyed by the power roller device, the whole device is arranged right above all the water pools, the first water pool, the second water pool and the third water pool are mutually separated, the base cloth is integrally wavy when running under certain power, the base cloth between every two power rollers is arc-shaped, the base cloth is positioned at the bottom of the arc-shaped and is immersed in the water pools, the time for immersing the base cloth in the water pools is determined according to the running speeds of the power rollers, the motion modes of the power rollers can also adopt regular intermittent motion, the time for each motion is longer than the time for standing, and therefore the time for immersing the base cloth in the water pools can be relatively prolonged after each position change of the base cloth, and the DMF removing effect of the base cloth is improved.
Moreover, because the base cloth is arc-shaped, the DMF in the base cloth can be gradually gathered at the bottom of the arc under the action of gravity due to the existence of the inclination angle of the base cloth immersed in the water tank, so that the solution in the water tank and the DMF can be fully mixed.
The length of the base cloth immersed in the water tank is consistent every time the power roller runs once, the length of the base cloth can be controlled by setting the running speed and the running time of the power roller, the base cloth is optimally and symmetrically arranged along the running direction by taking the water surface as a symmetrical plane, the length of the base cloth immersed in the water tank is called a lower half arc section, and the length of the base cloth exposed on the water surface is called an upper half arc section. Therefore, the whole base cloth is equally divided into an upper half arc section or a lower half arc section with multiple sections of equal width, DMF in the base cloth can be cleaned when the base cloth is positioned in the lower half arc section, DMF in the base cloth can be converged in the lower half arc section under the action of gravity when the base cloth is positioned in the upper half arc section, all the base cloth can be fully washed by water for multiple times, and the removal efficiency of the DMF in the base cloth is improved.
And this kind of mode of washing benefit lies in, when the base cloth operation in-process leaves the pond gradually, owing to be about to go upward, at this moment, the base cloth is the tilt state, and moisture can drop under the action of gravity, because DMF can dissolve in water, inside remaining DMF can be along with moisture and base cloth separation under the action of gravity, improves DMF's among the base cloth effect of getting rid of better.
In summary, the base cloth can be continuously cleaned for multiple times by reasonably adjusting the working parameters of the power rollers and the running state of the layout base cloth, and the DMF removing effect of the base cloth is the best.
The fifth step: preheating at 120 ℃, ironing, drying and shaping to obtain a base blank, wherein the ironing time of the base cloth is 1min, the drying time of the base cloth is 120 ℃, the drying time of the base cloth is 4min, and the shaping time of the base cloth is 120 ℃ for 5 s.
The method for testing the surface integrity of the semi-finished synthetic leather comprises the following steps: determining the content of organic substances to be more than 35% by using a carbon 12 isotope method; the second method comprises the following steps: measuring the content of heavy metal by a fluorescence spectrometer to be lower than the European Union standard; the third method comprises the following steps: measuring the DMF content by an image-liquid mass spectrometer to be lower than the European Union standard; the method four comprises the following steps: the resistance to aging was determined by the jungle test method to be unbreakable for 14 days. And finally, rolling up the qualified finished synthetic leather.
Example 2:
the base cloth of the bottom blank is cotton-polyester blended knitted fabric.
The preparation steps of the bottom embryo are as follows:
the first step is as follows:
the base fabric is pre-impregnated, in order to improve the pre-impregnation effect of the base fabric, the pre-impregnation temperature is 55 ℃, and the pre-impregnation time is 4 hours, so that the effect of the base fabric in the pre-impregnation process is greatly improved. The base cloth is in the in-process that soaks in advance, often can preimpregnate more base cloth, thereby in order to prevent that the base cloth is in the in-process that soaks in advance, thereby laminating each other between the base cloth influences the effect that soaks in advance of base cloth, and the designer improves the back, and in the in-process that soaks in advance, the staff constantly stirs the base cloth that soaks in advance, prevents that the base cloth from in the in-process that soaks in advance, and the base cloth is laminated together between the base cloth.
The pre-impregnation material comprises 90 parts of bio-based degradable polyurethane resin, 350 parts of DMF (dimethyl formamide) and 7.5 parts of ultrafine graphene. The preparation of the pre-impregnation material requires that the superfine graphene and DMF are added into a vacuum stirring kettle and stirred for 25min at the temperature of 27.5 ℃ at 650r/min, then the bio-based degradable polyurethane resin is added and stirred for 35min at 1250r/min, vacuum defoaming is carried out for 90min, and then 100 meshes are used for filtering to prepare the pre-impregnation working slurry.
In the process of pre-impregnation, because the base cloth of the base blank is a cotton-polyester blended knitted fabric, in the process of pre-impregnation, the pre-impregnation effect of the base cloth is poor, and workers find that the coverage rate of the bio-based degradable polyurethane resin, DMF (dimethyl formamide) and ultrafine graphene on the base cloth cannot meet the working requirement of the next step.
After improvement, a designer takes out the pre-impregnated base cloth from the pool, then hangs a plurality of base cloth in a drying chamber at 55 ℃ for drying treatment, and the drying duration is 6 min.
In practice, when a designer twists a towel, the designer finds that the water absorption of the towel laid flat is poor, the water absorption of the towel is greatly increased after the towel is kneaded, in order to increase the effect of the base cloth in the pre-impregnation process, the first step comprises a kneading machine, the base cloth is placed in the kneading machine after being taken out of a drying chamber, and the base cloth is pre-impregnated again after being kneaded for 4 seconds in the kneading machine. Designers find that the pre-impregnation effect of the base fabric is greatly improved after the base fabric is kneaded.
The second step is that: coating slurry containing biodegradable polyurethane resin is coated on the pre-impregnated base fabric. The coating slurry comprises 65 parts of bio-based degradable polyurethane resin, 35 parts of polyurethane resin, 100 parts of DMF (dimethyl formamide), 7.5 parts of carboxymethyl cellulose, 7.5 parts of superfine graphene, 7.5 parts of ramie fiber powder and 3.5 parts of calcium gluconate.
The preparation process of the coating slurry comprises the steps of adding superfine graphene, ramie fiber powder, carboxymethyl cellulose, calcium gluconate and DMF into a vacuum stirring kettle, stirring for 30min at 650r/min, adding the biodegradable polyurethane resin, stirring for 90min at 1250r/min, defoaming for 90min in vacuum, and filtering with a 190-mesh screen to prepare the coating working slurry for later use.
The base cloth passes through a scraper, No. two scrapers, No. three scrapers in proper order, includes a scraper, No. two scrapers and No. three scrapers on a scraper, No. two scrapers, No. three scrapers respectively, and a scraper is 8cm apart from the interval of base cloth, and No. two scrapers are 2cm apart from the interval of base cloth, and No. three scrapers are 0.4cm apart from the interval of base cloth.
In the in-process of using, if scrape the coating that one step of biodegradable polyurethane resin targets in place at the base cloth, lead to the formation of bubble easily, through different intervals between scraper, No. two scrapers and No. three scrapers and the base cloth for biodegradable polyurethane resin scribbles the effect of scraping on the base cloth and can promote, prevents the appearance of bubble.
The third step: so that the bio-based degradable polyurethane resin is solidified on the surface of the base fabric. The concrete step of solidification is that the cold air drying and solidification process is carried out for 1.5h on both sides of the base fabric under the condition that the temperature is 22.5 ℃.
The fourth step: washing the base cloth with clean water, and washing DMF on the base cloth. The specific steps of washing the base cloth with water are that the base cloth passes through a first water pool, a second water pool and a third water pool in sequence at a movement speed of 0.5m/s, and the base cloth is immersed in the water pools when passing through the water pools; the first water pool is saline solution, and the second water pool and the third water pool are clean water.
The base cloth soaked with the slurry is continuously conveyed by the power roller device, the whole device is arranged right above all the water pools, the first water pool, the second water pool and the third water pool are mutually separated, the base cloth is integrally wavy when running under certain power, the base cloth between every two power rollers is arc-shaped, the base cloth is positioned at the bottom of the arc-shaped and is immersed in the water pools, the time for immersing the base cloth in the water pools is determined according to the running speeds of the power rollers, the motion modes of the power rollers can also adopt regular intermittent motion, the time for each motion is longer than the time for standing, and therefore the time for immersing the base cloth in the water pools can be relatively prolonged after each position change of the base cloth, and the DMF removing effect of the base cloth is improved.
Moreover, because the base cloth is arc-shaped, the DMF in the base cloth can be gradually gathered at the bottom of the arc under the action of gravity due to the existence of the inclination angle of the base cloth immersed in the water tank, so that the solution in the water tank and the DMF can be fully mixed.
The length of the base cloth immersed in the pool is consistent every time the power roller runs once, the length can be controlled by setting the running speed and the running time of the power roller, optimally, the base cloth is symmetrically arranged along the running direction by taking the water surface as a symmetrical plane, the length of the base cloth immersed in the pool is called a lower half arc section, and the length of the base cloth exposed on the water surface is called an upper half arc section. Therefore, the whole base cloth is uniformly divided into a plurality of sections of upper half arc sections or lower half arc sections with the same width and length, the DMF in the base cloth can be cleaned when the base cloth is positioned at the lower half arc section, the DMF in the base cloth can be collected in the lower half arc section under the action of gravity when the base cloth is positioned at the upper half arc section, all the base cloth can be fully washed by water for many times, and the removal efficiency of the DMF in the base cloth is improved.
And this kind of mode of washing benefit lies in, when the base cloth operation in-process leaves the pond gradually, owing to be about to go upward, at this moment, the base cloth is the tilt state, and moisture can drop under the action of gravity, because DMF can dissolve in water, inside remaining DMF can be along with moisture with the base cloth separation under the action of gravity, improves the effect of getting rid of DMF in the base cloth better.
In summary, the base cloth can be continuously cleaned for multiple times by reasonably adjusting the working parameters of the power rollers and the running state of the layout base cloth, and the DMF removing effect of the base cloth is the best.
The fifth step: preheating at 120 ℃, ironing, drying and shaping to obtain a base blank, wherein the time for ironing the base cloth is 2min, the temperature for drying the base cloth is 140 ℃, the drying time for the base cloth is 6min, the temperature for shaping the base cloth is 140 ℃, and the time is 7 s.
The method for testing the surface integrity of the semi-finished synthetic leather comprises the following steps: determining the content of organic substances to be more than 35% by using a carbon 12 isotope method; the second method comprises the following steps: measuring the content of heavy metal by a fluorescence spectrometer to be lower than the European Union standard; the third method comprises the following steps: measuring the DMF content by an image-liquid mass spectrometer to be lower than the European Union standard; the method four comprises the following steps: the resistance to aging was determined by the jungle test method to be unbreakable for 14 days. And finally, rolling up the qualified finished synthetic leather.
Example 3:
the base cloth of the bottom blank is cotton-polyester blended knitted fabric.
The preparation steps of the bottom embryo are as follows:
the first step is as follows:
the base fabric is pre-impregnated, in order to improve the pre-impregnation effect of the base fabric, the pre-impregnation temperature is 60 ℃, and the pre-impregnation time is 5 hours, so that the effect of the base fabric in the pre-impregnation process is greatly improved. The base cloth is in the in-process that soaks in advance, often can preimpregnate more base cloth, thereby in order to prevent that the base cloth is in the in-process that soaks in advance, thereby laminating each other between the base cloth influences the effect that soaks in advance of base cloth, and the designer improves the back, and in the in-process that soaks in advance, the staff constantly stirs the base cloth that soaks in advance, prevents that the base cloth from in the in-process that soaks in advance, and the base cloth is laminated together between the base cloth.
The pre-impregnation material comprises 100 parts of bio-based degradable polyurethane resin, 400 parts of DMF (dimethyl formamide) and 10 parts of ultrafine graphene. The preparation of the pre-impregnation material requires that superfine graphene and DMF are added into a vacuum stirring kettle and stirred for 30min at the temperature of 30 ℃ at the speed of 800r/min, then bio-based degradable polyurethane resin is added and stirred for 40min at the speed of 1500r/min, vacuum defoaming is carried out for 120min, and then 100 meshes are used for filtering to prepare the pre-impregnation working slurry.
In the process of pre-impregnation, because the base cloth of the base blank is a cotton-polyester blended knitted fabric, in the process of pre-impregnation, the pre-impregnation effect of the base cloth is poor, and workers find that the coverage rate of the bio-based degradable polyurethane resin, DMF (dimethyl formamide) and ultrafine graphene on the base cloth cannot meet the working requirement of the next step.
After improvement, a designer takes out the pre-impregnated base cloth from the pool, then hangs a plurality of base cloth in a drying chamber at 60 ℃ for drying treatment, and the drying duration is 7 min.
In practice, when a designer twists a towel, the designer finds that the water absorption of the towel laid flat is poor, the water absorption of the towel is greatly increased after the towel is kneaded, in order to increase the effect of the base cloth in the pre-impregnation process, the first step comprises a kneading machine, the base cloth is placed in the kneading machine after being taken out of a drying chamber, and the base cloth is pre-impregnated again after being kneaded for 5 seconds in the kneading machine. Designers find that the pre-impregnation effect of the base fabric is greatly improved after the base fabric is kneaded.
The second step is that: coating slurry containing biodegradable polyurethane resin is coated on the pre-impregnated base fabric. The coating slurry comprises 70 parts of bio-based degradable polyurethane resin, 40 parts of polyurethane resin, 100 parts of DMF (dimethyl formamide), 10 parts of carboxymethyl cellulose, 10 parts of ultrafine graphene, 10 parts of ramie fiber powder and 5 parts of calcium gluconate.
The preparation process of the coating slurry comprises the steps of adding the ultrafine graphene, the ramie fiber powder, the carboxymethyl cellulose, the calcium gluconate and the DMF into a vacuum stirring kettle, stirring at 800r/min for 30min, adding the biodegradable polyurethane resin, stirring at 1500r/min for 120min, defoaming in vacuum for 120min, and filtering with a 200-mesh screen to prepare the coating working slurry for later use.
The base cloth passes through a scraper, No. two scrapers, No. three scrapers in proper order, includes a scraper, No. two scrapers and No. three scrapers on a scraper, No. two scrapers, No. three scrapers respectively, and a scraper is 7cm apart from the interval of base cloth, and No. two scrapers are 1cm apart from the interval of base cloth, and No. three scrapers are 0.2cm apart from the interval of base cloth.
In the in-process of using, if scrape the coating that one step of biodegradable polyurethane resin targets in place at the base cloth, lead to the formation of bubble easily, through different intervals between scraper, No. two scrapers and No. three scrapers and the base cloth for biodegradable polyurethane resin scribbles the effect of scraping on the base cloth and can promote, prevents the appearance of bubble.
The third step: so that the bio-based degradable polyurethane resin is solidified on the surface of the base fabric. The concrete step of solidification is that the cold air drying and solidification process is carried out for 2 hours on both sides of the base fabric under the condition that the temperature is 25 ℃.
The fourth step: washing the base cloth with clean water, and washing DMF on the base cloth. The specific steps of washing the base cloth with water are that the base cloth passes through a first water pool, a second water pool and a third water pool in sequence at a movement speed of 0.5m/s, and the base cloth is immersed in the water pools when passing through the water pools; the first water pool is saline solution, and the second water pool and the third water pool are clean water.
It should be noted that the base cloth soaked with the slurry is continuously conveyed by the power roller device, the whole device is arranged right above all the water pools, and the first water pool, the second water pool and the third water pool are mutually separated, the base cloth is in a wave shape when running under certain power, the base cloth between every two power rollers is in an arc shape, the base cloth is positioned at the bottom of the arc shape and is immersed in the water pool, the time for immersing the base cloth in the water pool is determined according to the running speed of the power rollers, the motion mode of the power rollers can also adopt regular intermittent motion, the time length of each motion is longer than the time length of rest, so that the immersed time length of the base cloth in the water pool can be relatively prolonged after each position change, and the DMF removing effect of the base cloth is improved.
Moreover, because the base cloth is arc-shaped, the DMF in the base cloth can be gradually gathered at the bottom of the arc under the action of gravity due to the existence of the inclination angle of the base cloth immersed in the water tank, so that the solution in the water tank and the DMF can be fully mixed.
The length of the base cloth immersed in the pool is consistent every time the power roller runs once, the length can be controlled by setting the running speed and the running time of the power roller, optimally, the base cloth is symmetrically arranged along the running direction by taking the water surface as a symmetrical plane, the length of the base cloth immersed in the pool is called a lower half arc section, and the length of the base cloth exposed on the water surface is called an upper half arc section. Therefore, the whole base cloth is uniformly divided into a plurality of sections of upper half arc sections or lower half arc sections with the same width and length, the DMF in the base cloth can be cleaned when the base cloth is positioned at the lower half arc section, the DMF in the base cloth can be collected in the lower half arc section under the action of gravity when the base cloth is positioned at the upper half arc section, all the base cloth can be fully washed by water for many times, and the removal efficiency of the DMF in the base cloth is improved.
And this kind of mode of washing benefit lies in, when the base cloth operation in-process leaves the pond gradually, owing to be about to go upward, at this moment, the base cloth is the tilt state, and moisture can drop under the action of gravity, because DMF can dissolve in water, inside remaining DMF can be along with moisture with the base cloth separation under the action of gravity, improves the effect of getting rid of DMF in the base cloth better.
In summary, the base cloth can be continuously cleaned for multiple times by reasonably adjusting the working parameters of the power rollers and the running state of the layout base cloth, and the DMF removing effect of the base cloth is the best.
The fifth step: preheating at 120 ℃, ironing, drying and shaping to obtain a base blank, wherein the time for ironing the base cloth is 3min, the temperature for drying the base cloth is 160 ℃, the drying time for drying the base cloth is 8min, the temperature for shaping the base cloth is 160 ℃, and the time is 9 s.
The method for testing the surface integrity of the semi-finished synthetic leather comprises the following steps: determining the content of organic substances to be more than 35% by using a carbon 12 isotope method; the second method comprises the following steps: measuring the content of heavy metal by a fluorescence spectrometer to be lower than the European Union standard; the third method comprises the following steps: measuring the DMF content by an image-liquid mass spectrometer to be lower than the European Union standard; the method comprises the following steps: the resistance to aging was determined by jungle test method to be unbreakable for 14 days. And finally, rolling up the qualified finished synthetic leather.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a looped fabric polyurethane synthetic leather base embryo is scraped in dip-coating of bio-based degradable containing which characterized in that: the base cloth of the bottom blank is cotton-polyester blended knitted cloth;
the preparation steps of the bottom embryo are as follows: firstly, pre-impregnating base cloth, wherein a pre-impregnating material comprises a bio-based degradable polyurethane resin, DMF (dimethyl formamide) and ultrafine graphene; secondly, coating slurry with bio-based degradable polyurethane resin on the pre-impregnated base cloth; thirdly, solidifying, namely solidifying the bio-based degradable polyurethane resin on the surface of the base cloth; the fourth step is that the base cloth is washed by clean water, and DMF on the base cloth is cleaned; fifthly, preheating, ironing, drying and shaping the base cloth to obtain the base blank;
the pre-impregnation material comprises 80-100 parts of bio-based degradable polyurethane resin, 300-400 parts of DMF (dimethyl formamide) and 5-10 parts of ultrafine graphene;
the coating slurry comprises 60-70 parts of bio-based degradable polyurethane resin, 30-40 parts of polyurethane resin, 100 parts of DMF (dimethyl formamide), 5-10 parts of carboxymethyl cellulose, 5-10 parts of superfine graphene, 5-10 parts of ramie fiber powder and 2-5 parts of calcium gluconate.
2. The bio-based degradable polyurethane base blank containing dip-coated and scratch-knitted fabric according to claim 1, wherein: the preparation requirement of the pre-impregnation material is that the superfine graphene and DMF are firstly added into a vacuum stirring kettle and stirred for 20-30min at 25-30 ℃ at 500 plus 800r/min, then the bio-based degradable polyurethane resin is added and stirred for 30-40min at 1000 plus 1500r/min, then the vacuum defoaming is carried out for 60-120min, and then 100 meshes are used for filtering to prepare the pre-impregnation working slurry.
3. The bio-based degradable polyurethane base blank containing dip-coated and scratch-knitted fabric according to claim 1, wherein: the preparation process of the coating slurry comprises the steps of firstly adding the ultrafine graphene, the ramie fiber powder, the carboxymethyl cellulose, the calcium gluconate and the DMF into a vacuum stirring kettle, stirring for 30min at 800r/min under the condition of 500 plus materials, then adding the bio-based degradable polyurethane resin, stirring for 60-120min under the condition of 1000 plus materials and 1500r/min, defoaming for 60-120min under the condition of vacuum, and filtering with 200-mesh plus materials under the condition of 180 plus materials to prepare the coating working slurry for later use.
4. The bio-based degradable dip-coated and scratch-coated knitted fabric-containing polyurethane synthetic leather base blank according to claim 1, which is characterized in that: in the first step, the temperature of pre-impregnation is 50-60 ℃, and the time of pre-impregnation is 3-5 h; and in the process of pre-impregnation, continuously stirring the pre-impregnated base cloth.
5. The bio-based degradable dip-coated and scratch-coated knitted fabric-containing polyurethane synthetic leather base blank according to claim 1, which is characterized in that: in the first step, the pre-impregnated base cloth is taken out of the pool, then the base cloth is hung in a drying chamber at 50-60 ℃ for 5-7min, and the base cloth is taken out of the drying chamber after the airing is finished.
6. The biodegradable polyurethane base blank containing dip-coated and scratch-knitted fabric according to claim 5, wherein: the first step comprises a kneading machine, the base cloth is placed in the kneading machine after being taken out from the drying chamber, and the base cloth is pre-impregnated again after being kneaded for 3-5s below the temperature in the kneading machine.
7. The bio-based degradable polyurethane base blank containing dip-coated and scratch-knitted fabric according to claim 1, wherein: in the second step, the base cloth passes through a scraper, a second scraper and a third scraper in sequence, the first scraper, the second scraper and the third scraper are respectively arranged on the first scraper, the second scraper and the third scraper, the distance between the first scraper and the base cloth is 7-9cm, the distance between the second scraper and the base cloth is 1-3cm, and the distance between the third scraper and the base cloth is 0.2-0.6 cm.
8. The bio-based degradable polyurethane base blank containing dip-coated and scratch-knitted fabric according to claim 1, wherein: in the third step, the concrete step of solidification is to carry out cold air drying and solidification process for 1-2h on both sides of the base fabric under the condition of temperature of 20-25 ℃.
9. The bio-based degradable polyurethane base blank containing dip-coated and scratch-knitted fabric according to claim 1, wherein: in the fourth step, the concrete step of washing the base cloth with water is that the base cloth passes through a first water pool, a second water pool and a third water pool in sequence at the movement speed of 0.5m/s, and the base cloth is immersed in the water pools when passing through the water pools; the first water pool is saline solution, and the second water pool and the third water pool are clean water.
10. The bio-based degradable polyurethane base blank containing dip-coated and scratch-knitted fabric according to claim 1, wherein: in the fifth step, the time for ironing the base cloth is 1-3min, the temperature for drying the base cloth is 120-160 ℃, the time for drying the base cloth is 4-8min, the temperature for shaping the base cloth is 120-160 ℃, and the time is 5-9 s.
CN202210522223.9A 2022-05-13 2022-05-13 Bio-based degradable dip-coating-containing scraping knitted fabric polyurethane synthetic leather base blank Pending CN115029934A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1444858A (en) * 1973-12-03 1976-08-04 Kasei Co C I Manufacture of permanent magnets
JPH09119049A (en) * 1995-10-24 1997-05-06 Yoshimitsu Saito Spun-laced nonwoven fabric of vegetable fiber imparted with flexibility and bulkiness
JP2011226047A (en) * 2010-04-02 2011-11-10 Honda Motor Co Ltd Synthetic imitation leather made by using bio-polyurethane resin

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1444858A (en) * 1973-12-03 1976-08-04 Kasei Co C I Manufacture of permanent magnets
JPH09119049A (en) * 1995-10-24 1997-05-06 Yoshimitsu Saito Spun-laced nonwoven fabric of vegetable fiber imparted with flexibility and bulkiness
JP2011226047A (en) * 2010-04-02 2011-11-10 Honda Motor Co Ltd Synthetic imitation leather made by using bio-polyurethane resin

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
马兴元 等: "《人造革/合成革材料及工艺学》", vol. 1, 30 November 2015, 中国轻工业出版社, pages: 120 - 121 *

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